Vector $\vec { A }$ Has Magnitude 2 Units and Is Directed to the North

Multiple Choice

Vector $\vec { A }$ has magnitude 2 units and is directed to the north. Vector $\overrightarrow { \mathbf { B } }$ has magnitude $5 \text { units }$ and is directed to the south. Calculate the magnitude and direction of $\overrightarrow { \mathbf { A } } - \overrightarrow { \mathbf { B } }$ .

A) 7 units, north
B) 7 units, south
C) 3 units, north
D) 3 units, south